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ADC12DJ2700 Datasheet(PDF) 63 Page - Texas Instruments

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Part No. ADC12DJ2700
Description  5.4-GSPS Single-Channel or 2.7-GSPS Dual-Channel, 12-Bit, RF-Sampling Analog-to-Digital Converter (ADC)
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADC12DJ2700 Datasheet(HTML) 63 Page - Texas Instruments

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ADC12DJ2700
www.ti.com
SLVSEH9 – JANUARY 2018
Product Folder Links: ADC12DJ2700
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Copyright © 2018, Texas Instruments Incorporated
The ADC12DJ2700 has a total of 16 high-speed output drivers that are grouped into two 8-lane JESD204B links.
Most operating modes use two links with up to eight lanes per link. The lanes and their derived configuration
parameters are described in Table 20. For a specified JMODE, the lowest indexed lanes for each link are used
and the higher indexed lanes for each link are automatically powered down. Always route the lowest indexed
lanes to the logic device.
Table 20. ADC12DJ2700 Lane Assignment and Parameters
DEVICE PIN
DESIGNATION
LINK
DID (User Configured)
LID (Derived)
DA0±
A
Set by DID (see theJESD204B DID parameter
register), the effective DID is equal to the DID register
setting (DID)
0
DA1±
1
DA2±
2
DA3±
3
DA4±
4
DA5±
5
DA6±
6
DA7±
7
DB0±
B
Set by DID (see theJESD204B DID parameter
register), the effective DID is equal to the DID register
setting plus 1 (DID+1)
0
DB1±
1
DB2±
2
DB3±
3
DB4±
4
DB5±
5
DB6±
6
DB7±
7
7.4.3.1 JESD204B Output Data Formats
Output data are formatted in a specific optimized fashion for each JMODE setting. When the DDC is not used
(decimation = 1) the 12-bit offset binary values are mapped into octets. For the DDC mode, the 16-bit values (15-
bit complex data plus 1 overrange bit) are mapped into octets. The following tables show the specific mapping
formats for a single frame. In all mappings the tail bits (T) are 0 (zero). In Table 21 to Table 38, the single-
channel format samples are defined as Sn, where n is the sample number within the frame. In the dual-channel
real output formats (DDC bypass and decimate-by-2), the samples are defined as An and Bn, where An are
samples from channel A and Bn are samples from channel B. In the complex output formats (decimate-by-4,
decimate-by-8, decimate-by-16), the samples are defined as AIn, AQn, BIn and BQn, where AIn and AQn are the
in-phase and quadrature-phase samples of channel A and BIn and BQn are the in-phase and quadrature-phase
samples of channel B. All samples are formatted as MSB first, LSB last.


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